I performed a search and do really see this issue discussed. Yesterday, I was headed out to my sister's for Easter and my daughters piled in my truck to go with me. A few months ago, one of my daughter's cell phones crapped out and I gave her my old Blackberry to use until her plan allows her a low-cost upgrade. She was sitting in the back seat in, which is in front of the amp I installed a few weeks ago. Every once in a while you'd get that so familiar buzz from the cell phone going through the stereo system. I hear that same sound all the time while charging my cell phone through my laptop. Is there a fix for this or do I have to confiscate rear seat passenger's cell phones?